In May, as the New Orleans Times-Picayune put to bed an epic, eight-part investigation into Louisiana’s prison system, its editors began to disappear. First, Mark Lorando, the features editor, was nowhere to be found. Then the chairs of the online editor, Lynn Cunningham, and the sports editor, Doug Tatum, were empty. So was that of the city editor, Gordon Russell. Newsroom wags called it The Rapture.